Rammer



Jan. 8 1924. v 1,480,304

A. SALIGER RAMMER Filed July 5. 1921 Patented Jan. 8, 1924.

n 'UNITED STATES NPa'rlezN'l" OFFICE.

mon semana, or s'r. Louis, mssouar.

man. i

Application ma my s, 1921. semi n. eaaoa.

To all 'whom it concern.'

Be it known t at I, ANTON Samoan, a citizen of the United States, and aresident ofl the city of St. Louis and State of Missouri, have inventeda new and useful Improvement in Remmers, of which the following is aspecification.

This invention relates rincipally to fluid operated rammers of the dused by metal founders for ramming, compressi or packt ing molding sandabout the mol ing pattern, whereby the sand is made to conformaccurately to the surfaces of the pattern, and it relates particularlyto the rammerhead or butt for said rammers.

One of the principal objects of the present invention is to provlde therammerbutt with an elastic pad for the protection of the butt andpattern during the packing of the sand. Another object is to removablysecure the sad to the butt, whereby the pad is adapte to be replacedwhen it becomes Worn or damaged. Another 0bject is to eliminate the needfor seiarate fastening members, such as screws an bolts, for securingthe pad to the butt, which fasteners are liable to become loosenedduring the ramming operation and dama e the pattern. Other obJects areto simpli y the construction and to reduce the cost of manufacture.

The invention consists princi ally in a. rammen-head or butt adapted toe attached to the piston of a rammer and a tip or pad of india-rubber orother suitable elastic substance adapted to be detachably secured tosaid butt; and it also consists in the combinations and arran ments ofparts hereinafter described an claimed.

In the accompanyin drawing, which forms part of this speci cation, andwherein like symbols. refer to like parts wherever the occur,

liyig. 1 is a side elevation of the forward end of a portablesand-remmer provided with a butt embodying my invention;

Fig. 2 is a central longitudinal section through said butt, the forwardend portion of the piston being shown in elevation;

Fig. 3 is a central longitudinal section through the metallic bodyportion of said butt; and

Fig. 4 is a perspective view of the impactiece therefor.

Re erring to the accompanying drawin my invention is shown in connectionwit an ordinary portable Huid-operated sandrammer comprising a cylinder5 and a pisixm 6 working therein The piston 6 is reciprocated lo'tudinally of the cylinder 5 bymeans of uid pressure which is controlledb the usual valves (not shown) at the hand e-end of thel rammer. Thepiston extends through suitable ackin (not shown) at the outer end of te c lmder 5, which packing ,is held therein of a8 packing-nut 7 providedwith' a locknut The piston projects forwardly beyond the packing-nut 7and has a tapered end portion 9 ada ted to receive a metallic rammerheador utt comprisino' a metallic body portion 10 and a detachableimpact-piece giaferably in the form of an elastic pad 11.

e rammer-head 10 is preferabl made of aluminum and comprises a cylinrical base portion and a substantially conical upper portion.

y meansV The rammey-head has a cylindrical steel sleeve or bushing 12cast therein concentric with the longitudinal axis thereof. The upperend of the bushing 12 terminates flush with the top surface of therammer-head. The lower end of the bushing is closed by the metal of therammer-head. The bore 13 of the bushing 12 is tapered to fit the taperedend portlon 9 of the piston 6; and said bushing is rovided midwaybetween its ends with a circular flange or collar 14, which preventsendwise movement of said bushing with respect to said remmer-head.

The base of the rammer-head is provided with an undercut circular cavityor recess 15, adapted to receive a similarly undercut circular headportion 16, formed on the upper end of the elastic pad 11, the recess 15and the head 16 bein substantially of a corresponding size an shape.This arrangement constitutes in eect a dove-tail joint between therammer-head and the impact pad and firmly secures the pad to therammer-head without the use of separate fasteners. The pad 11 isattached to the rammer-head 10 by forcing the undercut head portion 16of saidl pad into the undercut recess 15 of said rammer-head, theelasticit of the pad permittin the undercut hea portion to contractsucientlv to ermit the larger diameter of the head to c ear the smallerdiameter of the undercut recess. The impact pad protects the rammer-headand pattern and can be readily attached to said head and detachedtherefrom. The elasticity of said pad causes the remmer to strike ayielding blow, thus causing the sand to conform more accurately to thepattern. The elastic pad is preferably made of india-rubber or otherlsuitable elastic substance.

It is noted that the use of the hardened steel bushing 12 preventsenlargement of the iston receiving hole 13 of the remmerhead) andpermits the body of the remmerhead to be made of aluminum or other softlightweight metal.

Obviously the construction hereinbefore described admits of considerablemodification without departing from my invention. For instance, thebaseof the remmer-head may be provided with an undercut channel, and anon-elastic pad may be provided with a similarly shaped undercut ribadapted to it in said channel, the dovetail joint thus formed preventingthe separation of the pad from the remmer-head except by force appliedin the direction of the length of said channel and said rib.

What I claim is:

l. A remmer-head comprising a body member and an impact iece therefor,said body member and said 1m act piece being formed with mating un ercutportions, whereby they are detachably secured together.

2. A remmer-head comprising a body member and an elastic pad therefor,said body member and said elastic pad being formed with mating undercutportionsgL whereby they are detachably secured together.

3. A rammer-head comprising a body member having an undercut recess inthe base thereof, and an elastic pad having an undercut head portionadapted to lit the undercut recess in said body member.

4; A remmer-head comprising a body member having an undercut circularrecess in the basethereof, and an elastic pad undercut recess, wherebysaid. pad is de-` tachably secured to said ramnier-head.

6. A rammer head comprising a body ortion having an undercut circularrecess ormed in the base thereof, and an ielastic an undercut circularhead pori pad having tion of a size and shape correspondin substantiallyto the size and shape of said re-r cess, the ad portion of said elasticpad being adapted to be forced into said recess in said rammer-head,whereby said pad is detachably secured to said rammer-head.

7. A rammer head comprisin a body portion having a hardened stee bushingtherein said bushing having a tapered bore adapted ton of a rammel'.

8. A rammer-head comprising a body member having a bore which is taperedto fit the tapered end of a piston of a remmer, said body member havingan undercut circular recess formed in its base portion, and an elasticpad havin an undercut circular head portion adapte to be forced intosaidv undercut recesses, whereby said pad is detachably secured to saidremmer-head.

9. A resilient tamping butt for rammers, comprising a shank having amortise in its lower side, and a rubber butt having a tenen on its upperside adapted to engage the mortise of the shank, and means forfrictionally connecting the shank to the end of the rammel' rod.

Signed at St. Louis, Missouri, this 1st day of July, 192i.

ANTON SALGER.

to receive the tapered end of a pis-l

